Ink jet recording method and ink jet recording device

Abstract

An ink jet recording method includes a first reaction liquid applying step, a first ink applying step, a second reaction liquid applying step and a second ink applying step in this order. A viscosity of a mixed liquid 1-1 obtained by mixing the first reaction liquid and the first ink at a mass ratio of 7:100 is higher than a viscosity of a mixed liquid 2-1 obtained by mixing the second reaction liquid and the first ink at a mass ratio of 7:100, and a viscosity of a mixed liquid 1-2 obtained by mixing the first reaction liquid and the second ink at a mass ratio of 7:100 is higher than a viscosity of a mixed liquid 2-2 obtained by mixing the second reaction liquid and the second ink at a mass ratio of 7:100.

What is claimed is: 
     
         1 . An ink jet recording method of ejecting a first ink, a second ink, a first reaction liquid and a second reaction liquid from a recording head to record an image on a recording medium such that the first ink, the second ink, the first reaction liquid and the second reaction liquid overlap each other on at least a part of a region of the recording medium, the method comprising in the following order:
 applying the first reaction liquid to the recording medium;   applying the first ink to a region where the first reaction liquid has been applied;   applying step of applying the second reaction liquid to the recording medium; and   applying the second ink to a region where the second reaction liquid has been applied,   wherein the first ink is an aqueous ink comprising a pigment,   wherein the second ink is an aqueous ink comprising at least one particulate substance selected from the group consisting of a pigment and a resin particle,   wherein the first reaction liquid and the second reaction liquid are respectively an aqueous reaction liquid comprising a reactant that reacts with an ink,   wherein the first reaction liquid comprises a water-soluble cationic resin,   wherein a viscosity of a mixed liquid 1-1 obtained by mixing the first reaction liquid and the first ink at a mass ratio of 7:100 is higher than a viscosity of a mixed liquid 2-1 obtained by mixing the second reaction liquid and the first ink at a mass ratio of 7:100,   wherein a viscosity of a mixed liquid 1-2 obtained by mixing the first reaction liquid and the second ink at a mass ratio of 7:100 is higher than a viscosity of a mixed liquid 2-2 obtained by mixing the second reaction liquid and the second ink at a mass ratio of 7:100, and   wherein a water absorption amount of the recording medium from a start of contact to 30 msec 1/2  in a Bristow method is 10 mL/m 2  or less.   
     
     
         2 . The ink jet recording method according to  claim 1 ,
 wherein the cationic resin of the first reaction liquid is a resin having a structure of a quaternary ammonium salt.   
     
     
         3 . The ink jet recording method according to  claim 1 ,
 wherein the second reaction liquid contains a water-soluble cationic resin.   
     
     
         4 . The ink jet recording method according to  claim 3 ,
 wherein a content (% by mass) of the cationic resin in the first reaction liquid is more than a content (% by mass) of the cationic resin in the second reaction liquid.   
     
     
         5 . The ink jet recording method according to  claim 1 ,
 wherein a surface tension of the second reaction liquid is higher than a surface tension of the first reaction liquid.   
     
     
         6 . The ink jet recording method according to  claim 1 ,
 wherein the pigment of the first ink is titanium oxide.   
     
     
         7 . The ink jet recording method according to  claim 1 ,
 wherein the viscosity of the mixed liquid 1-1 obtained by mixing the first reaction liquid and the first ink at a mass ratio of 7:100 is twice or more of the viscosity of the mixed liquid 2-1 obtained by mixing the second reaction liquid and the first ink at a mass ratio of 7:100.   
     
     
         8 . The ink jet recording method according to  claim 1 ,
 wherein the first reaction liquid comprises at least one selected from the group consisting of a polyvalent metal salt and an organic acid.   
     
     
         9 . The ink jet recording method according to  claim 1 ,
 wherein a content (% by mass) of the reactant in the first reaction liquid is more than a content (% by mass) of the reactant in the second reaction liquid.   
     
     
         10 . The ink jet recording method according to  claim 1 ,
 wherein the first ink further contains a water-soluble resin.   
     
     
         11 . The ink jet recording method according to  claim 10 ,
 wherein the second ink further comprises a water-soluble resin, and   wherein an acid value of the water-soluble resin in the first ink is more than an acid value of the water-soluble resin in the second ink.   
     
     
         12 . The ink jet recording method according to  claim 1 ,
 wherein the first ink is a white ink, and   wherein the second ink is a non-white ink.   
     
     
         13 . The ink jet recording method according to  claim 1 ,
 wherein the first ink is a white ink, and   wherein the second ink is a clear ink containing no pigment.   
     
     
         14 . The ink jet recording method according to  claim 1 ,
 wherein the first ink and the second ink, and the first reaction liquid and the second reaction liquid are respectively applied to a unit area of the recording medium by relative scanning of the recording head and the recording medium carried out a plurality of times.   
     
     
         15 . The ink jet recording method according to  claim 1 ,
 wherein the first ink and the second ink, and the first reaction liquid and the second reaction liquid are respectively applied to a unit area of the recording medium by relative scanning of the recording head and the recording medium carried out once, and   wherein a difference in time between the application of the first ink and the application of the second reaction liquid to a unit area is 5 second or longer.   
     
     
         16 . An ink jet recording device used to eject a first ink, a second ink, a first reaction liquid and a second reaction liquid from a recording head to record an image on a recording medium such that the first ink, the second ink, the first reaction liquid and the second reaction liquid overlap each other on at least a part of a region of the recording medium, the device comprising in the following order:
 a first reaction liquid applying unit configured to apply the first reaction liquid to the recording medium;   a first ink applying unit configure to apply the first ink to a region where the first reaction liquid has been applied;   a second reaction liquid applying unit configured to apply the second reaction liquid to the recording medium; and   a second ink applying unit configured to apply the second ink to a region where the second reaction liquid has been applied,   wherein the first ink is an aqueous ink comprising a pigment,   wherein the second ink is an aqueous ink comprising at least one particulate substance selected from the group consisting of a pigment and a resin particle,   wherein the first reaction liquid and the second reaction liquid are respectively an aqueous reaction liquid comprising a reactant that reacts with an ink,   wherein the first reaction liquid comprises a water-soluble cationic resin,   wherein a viscosity of a mixed liquid 1-1 obtained by mixing the first reaction liquid and the first ink at a mass ratio of 7:100 is higher than a viscosity of a mixed liquid 2-1 obtained by mixing the second reaction liquid and the first ink at a mass ratio of 7:100,   wherein a viscosity of a mixed liquid 1-2 obtained by mixing the first reaction liquid and the second ink at a mass ratio of 7:100 is higher than a viscosity of a mixed liquid 2-2 obtained by mixing the second reaction liquid and the second ink at a mass ratio of 7:100, and   wherein a water absorption amount of the recording medium from a start of contact to 30 msec 1/2  in a Bristow method is 10 mL/m 2  or less.